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Tetrazine molecules as an efficient electronic diversion channel in 2D organic-inorganic perovskites.
Mater Horiz
May 2021
Université Paris-Saclay, ENS Paris-Saclay, CNRS, CentraleSupelec, LuMIn (Laboratoire Lumière, Matière et Interfaces), 91190 Gif-sur-Yvette, France.
Taking advantage of an innovative design concept for layered halide perovskites with active chromophores acting as organic spacers, we present here the synthesis of two novel two-dimensional (2D) hybrid organic-inorganic halide perovskites incorporating for the first time 100% of a photoactive tetrazine derivative as the organic component. Namely, the use of a heterocyclic ring containing a nitrogen proportion imparts a unique electronic structure to the organic component, with the lowest energy optical absorption in the blue region. The present compound, a tetrazine, presents several resonances between the organic and inorganic components, both in terms of single particle electronic levels and exciton states, providing the ideal playground to discuss charge and energy transfer mechanisms at the organic/inorganic interface.
View Article and Find Full Text PDFNanocrystal/Metal-Organic Framework Hybrids as Electrocatalytic Platforms for CO Conversion.
Angew Chem Int Ed Engl
September 2019
Laboratory of Nanochemistry for Energy (LNCE), Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne, 1950, Sion, Switzerland.
The tunable chemistry linked to the organic/inorganic components in colloidal nanocrystals (NCs) and metal-organic frameworks (MOFs) offers a rich playground to advance the fundamental understanding of materials design for various applications. Herein, we combine these two classes of materials by synthesizing NC/MOF hybrids comprising Ag NCs that are in intimate contact with Al-PMOF ([Al (OH) (TCPP)]) (tetrakis(4-carboxyphenyl)porphyrin (TCPP)), to form Ag@Al-PMOF. In our hybrids, the NCs are embedded in the MOF while still preserving electrical contact with a conductive substrate.
View Article and Find Full Text PDFMix and Match: Organic and Inorganic Ions in the Perovskite Lattice.
Adv Mater
November 2019
Department of Chemistry, University of Pennsylvania, Philadelphia, PA, 19104-6323, USA.
Materials science evolves to a state where the composition and structure of a crystal can be controlled almost at will. Given that a composition meets basic requirements of stoichiometry, steric demands, and charge neutrality, researchers are now able to investigate a wide range of compounds theoretically and, under various experimental conditions, select the constituting fragments of a crystal. One intriguing playground for such materials design is the perovskite structure.
View Article and Find Full Text PDF[(CH)NH]PbX (X = Cl and Br), 2D-Perovskite Related Hybrids with Dielectric Transitions and Broadband Photoluminiscent Emission.
Inorg Chem
March 2018
QuiMolMat Group, Department of Chemistry, Faculty of Science and CICA , University of A Coruña, Campus A Coruña , 15071 A Coruña , Spain.
We have prepared two new lead halides with the novel general formula of DMAPbX (DMA = [(CH)NH] and X = Cl or Br) by using an easy route under mild conditions at room temperature. These compounds exhibit an unprecedented crystal structure, are formed by layers of distorted [PbX] octahedra, which share corners and faces, and contain intercalated DMA cations. Very interestingly, they display dielectric transitions, which are related to a partial order-disorder process of the DMA cations between 160 and 260 K.
View Article and Find Full Text PDFTwo-dimensional (2D) hybrid perovskites are stoichiometric compounds consisting of alternating inorganic metal-halide sheets and organoammonium cationic layers. This materials class is widely tailorable in composition, structure, and dimensionality and is providing an intriguing playground for the solid-state chemistry and physics communities to uncover structure-property relationships. In this Perspective, we describe semiconducting 2D perovskites containing lead and tin halide inorganic frameworks.
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